Abstract: In a wound treatment method and apparatus a multiplicity of separately packaged doses of antibiotics, coagulants, anesthetic agents, and similar medicaments are introduced into a wound by a foaming carrier which acts as a mixing and transport medium and also functions as a plug to retain the medication in the wound and to prevent the entry of contaminents and bacteria. The medication is introduced into the would site by means of a foamable carrier which entrains the medication during it travel through a medication cell.

Abstract: In a combined obscuration and scattered-light smoke detector, light from a light source in a smoke chamber is reflected from an image-forming optical component onto a first light sensor which senses a reduced electrical signal in the presence of smoke while a second sensor, viewing light from the light source at an angle, senses an increased electrical signal in the presence of smoke. The output of each receptor is subjected to a band pass filter, an amplifier and a comparator; the resultant signals insure early and reliable activation of an alarm when even a low level of smoke is present in the smoke detector. A second light source having a wavelength different from that of the first light source provides, in the obscuration mode, added sensitivity to smoke.

Abstract: An apparatus for applying a laser beam to an area on a work surface includes means for viewing said area with visible light prior and subsequent to application of the laser beam. The laser beam system includes a stationary portion comprising a laser, condenser and pinhole and a movable portion comprising a large aperture objective. The visible light system comprises a fixed video camera and lens and a movable portion including an objective and a light source. The movable portions of the laser beam system and the visible light system are mounted on a common slidable carriage.

Abstract: A kit for converting a conventional slide or motion picture projector to a closed circuit television device primarily for classroom, seminar and home entertainment use, consisting of two main modules: a new lamp which substitutes for the normal projection lamp, and a lens-video camera combination which takes the place of the normal projection lens. The features and characteristics of the projector itself remain unchanged. The signal from the lens-television module can be viewed on a video screen, or recorded on a video recorder with or without modification by accessory components.

Abstract: The invention provides a highly corrected, parfocalized, two-focal-length optical system comprising a primary image producing group consisting of a catadioptric lens system which forms its image within a first, positive field lens, and a second group comprising a symmetrical relay system coaxial with the primary group and movable axially relative to the primary image producing group, the relay system reimaging the image formed by the primary group through a second, negative field lens onto the fixed plane of the final image, movement of the relay lens between its extreme positions permitting close focusing of the entire system without altering its overall length.

Abstract: The invention provides a highly corrected catadioptric telephoto lens comprising in succession, from the long conjugate end, an aspherized negative meniscus corrector plate, a Mangin type primary mirror which directs light to a secondary mirror comprising the central portion of the second surface of the corrector lens, a first positive meniscus corrector lens and a second biconcave corrector lens. The relative aperture is f/8 and the overall length of the system from first vertex to image plane is less than 0.4 focal length.